How to clean heat exchanger

[Janz]

Hi,

reading all the related post and the stuff that I already tried I really think that the "Heat Exchanger" of our "Worcester 24i Junior" (not greenstar) needs to be cleaned or even replaced.
I have looked at it but it seems to be inpossible to take the "Heat Exchanger" out of the boiler... please does anyone know how to do it?

Thanks a lot
Regards
Janz

 

[PowerFlushAssoc]

You can power flush the primary heat exchanger without removing it. You can either connect the power flush machine directly onto the boilers flow and return or you can connect into a radiator and close all but one other radiator, this will force the flow through that exchanger.
For the secondary or plate heat exchanger you will need to remove it and chemical clean / power flush / replace.

 

[Janz]

Hi, thanks for the tip.
Please, if I do this, where the 'rubbish' will go Or, should I turn on taps on when I'm doing it?
// I think the problem is in Primary heat exchanger - since before the boiler stopped working it was really noisy, watter was boiling like crazy a we heard that the air is there.
Thanks a lot

 

[Janz]

+ One more question please.
If I remove the "Heat Exchanger", what chemicals I need for cleaning the scale etc? Is the 'Concentrated Custic Soda' Strong enough?
Thanks

 

[SimonJohns]

By the sounds of this you have a little bit of knowledge. And to be totally honest it would be cheaper for you to get a GSR in an have them to do a proper diagnosis.

 

[Janz]

Hi Simon,
thanks The problem is that I haven't got money at all, so I'm facing only two options...
A, to try it by myself or
B, facing very could winter ;(

 

[SimonJohns]

Hi Simon,
thanks The problem is that I haven't got money at all, so I'm facing only two options...
A, to try it by myself or
B, facing very could winter ;(

Why don't you first explain the symptoms and we'll see if there's another way of helping you

 

[nysk2008]

what ever you do if you remove the (the kebab looking thing) please make sure you replace the gasket

 

[yo1]

one question, may be a bit unrelated but and I am pretty sure what i understand is correct so also dont mean to waste anyone's time..
If the Worcester was a combi and you do a power flush on it. if its not running whilst your flushing the system will it only circulate through the secondary heat ex, and to circulate it through the primary the heating will have to be on the whole time?

 

[Janz]

Thank you Simon and others...
Basuically, first the problem was that the boiler was heating->boiling like crazy, I heard the air in the "Heat Exchanger" and the presure went up to the maximum... than it stoped working completely.
What is happening now? The boiler doesn't light up and I know for sure that the Air pressure Switch
and Control Board are working fine.

Any ideas are very much appreciated! Thank you guys!

 

[mikegas]

one question, may be a bit unrelated but and I am pretty sure what i understand is correct so also dont mean to waste anyone's time..
If the Worcester was a combi and you do a power flush on it. if its not running whilst your flushing the system will it only circulate through the secondary heat ex, and to circulate it through the primary the heating will have to be on the whole time?

To get to the secondary heat ex it has to go through the primary

 

[Janz]

one question, may be a bit unrelated but and I am pretty sure what i understand is correct so also dont mean to waste anyone's time.. ...

Good question... I don't know!?

 

[nysk2008]

to be fair, save your fingers typing and and a gsr engineer in, we cant second guess everything. if not hope you get advice and good luck, hope you get it sorted.

 

[Billy Bob Bob]

what ever you do if you remove the (the kebab looking thing) please make sure you replace the gasket

different boiler its not a greenstar

 

[yo1]

"To get to the secondary heat ex it has to go through the primary"

ok, just read my post also and saw it didn't make sense there, the power flush will circulate through the primary heat x only when heating is on, when hot water is on it will not circulate through the primary as the div valve will not allow it too so there for if the boiler is off or not on heating mode you will not be flushing the boiler.. or am i in correct and the div valve will not effect flow through the main heat like this x?